Improvement in connections for bed-bottom springs



A. C. MBMAINS.

Connection for Bed-Bottom Springs. N0 ]6-O,274. Patented March 2,1875.

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UNITED STATES PATENT OFFICE.

ALEXANDER C. MGMAINS, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN CONNECTIONS FOR BED-BOTTOM SPRINGS.

Specification forming part of Letters Patent No. 160,274, dated March 2,1875; app'licaion filed January 7, 1875.

To all whom it may concern Beitknownthat I,ALEXANDERC.MGMAINS, of SanFrancisco, county of San Francisco and State of California, haveinvented an Improved Device for Uniting or Con nectin g Spiral Springsin the Manufacture of Mattresses, &c.; and I do hereby declare that thefollowing specification and accompanying drawings are sufficient toenable any person skilled in the art or science to which it most nearlyappertains to make and use my said invention without further inventionor experiment.

This invention consists in connecting spiral springs at their bases andtops by means of a four-armed bent-wire clamp, which unites the springsin groups of four, and by which an equal and even adjustment of thesurface is bad when pressureis brought to bear upon the mattress.

In the drawings Figure 1 is a plan of my device, showing its applicationto a group of four spiral springs, and any number may be connected inthe same manner to make the size of mattress desired. Fig. 2 is a sideview of the clamp.

A represents a double clamp, which I prefer to make of wire, which isbent double, or with parallel strands, so as to form four arms, B. Thisclamp is placed so as to fill the hollow square formed by the fourspiral springs, both at the base and at the top, and the four arms ofthe upper clamp are bent down around the top wire of the spirals of eachof the four springs, while the ends of the arms of the lower clamp arebent upward and over the bottom spiral. Thus any number of springs maybe connected and bound together, forming a uniform surface of greatstrength, and no part or portion of the mattress or any of the spiralscan be moved independent of the others.

Having thus described my invention, it should here be observed that I amaware that it has been proposed to unite spiral springs by fourindependent clamps clasped around the four spirals above and below, orat the top and base, at right angles. This does not prevent the springsfrom being raised up and separated to a certain extent when pressure isbrought to bear upon the surface, for the reason that there is no centersupport in the hollow square formed by joining the spirals; and thisdevice forms no part of my invention; but

What I do claim, and desire to secure by Letters Patent, is

The combination of the double four-armed clamps A B with the spiralsprings, substantially as and for the purpose set forth.

In witness whereof I have hereunto set my hand and seal.

ALEXANDER o. MOMAINS. [L. s]

Witnesses:

O. W. M. SMITH, PHILIP MAHLER.

